Rail-drilling device



- P. G. BODWEL L.

RAIL DRILLING DEVICE.

APPLICATION FILED OCT. 25. 1920.

Patented. May 16, 119122 5 SHEETS-SHEET 1.

INVENTOR ITNBS:

5 SHEETS-SHEET 2- Patented May 16, 1922.

P. e. BODWELL.

RAIL DRILLING DEVICE- APPUCATION FILED OCT. 25 I920.

m W M ATTORNEY a fi00 W6// P. G. BODWELL,

. BAIL DRILLING DEVICE. APPLICATION FILED ocr. 25.. 1920 Patented May 16, 11.922.

5 SHEETS-SHEET 3.

A'TTORNEY P. G. BODWELL.

BAIL DRILLING DEVICE. APPLICATION FILED OCT. 25'. I920.

Patent ed May 16, 1922.

5 SHEETS-SHEET 4- P. G. BODWELL.

RAIL DRILLING DEVICE.

APPLICATION FILED OCT. 25; 1920. 1,416,609, Patented May 16, 1922,

5 SHEETS-SHEET 5- ATFORNEY v i W31 "=11 on a e l a p t it it lit u lane l l},

BOD'WELL, F GRIFFIN,

RAIL-DHILDING" nnvrcn.

Application To all whom it may concern:

Be it known that L'PAUL G. Bonwnrr, a citizen of the United States, residing at Griflin, in the county of Spalding and State of Georgia, have invented new and useful Improvements in Rail-Drilling Devices, of which the following is a specification.

This invention relates to drilling inachines and has for its object the provision of a portable drilling device provided with wheels so that it may travel along the rails of a track, the device being intended for drilling holes in rails at the joints for the securing of rail bonds used on roads equipped with electric block signals.

An important object is the provision of a devicecf this character which-includes a drilling frame swingingly supported below the wheeled frame and movable upwardly when its use is not desired so as to ride clear of any ordinary"obstruction which might be found on the trackway.

Another object is the provision of a device of this character which is provided with a power device such as an electric motor or preferably a gasoline engine for operating the drill, the drill having associated therewith a clutch controlled automaticfeed which advances the drill simultaneously with its rotation, manual means being provided for withdrawing the drill from the hole bored.

A further object is the provision of a device of this character which is provided with an automatiostop device which breaks the ignition circuit of a motor when the drill has completed boring the hole.

Another'object is the provision of a de-' vice of this character in which the movable frame carrying the drilling device carries a plurality of hooks provided with operating handles and engageable, over the rail being drilled whereby to hold the drilling device to, the rail.

An additional object is the provision of adevice of this character which will becomparatively simple in construction, easy to operate, rapid in action, eflicient and durable in service, and a general improvement in the art.

With the above and other objects and ad vantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illus- Speeification of Letters fat-e112.

lblay 16, 19223.

filed October 25, 1920. Serial No. 419,334.

ated in whichltigure 1 is a side elevation l gure 2 is a plan view,

7 nigure 3 is a front elevation showing the deyi ce in operative position, a

lf igure f is a similar view showing the drilling frame swun into inoperative position,

Figure 5 is a cross sectional view on the l1ne5-5 of Figure 2-,

Figure 6 is a cross sectional view on the line 6-6 of l igure 2.

.l igure 7 is a longitudinal sectional view showing in detail the clutch mounting and feed device.

Figure 8 form and Figure 9 is a longitudinal section through the transmission mechanism. thereof". b Reiierringg; more particularly to the drawings, l have shown my device as comprising a main supporting frame including bars 10 upon one end of which is secured volte 11 having an axle 12 carrying a wheel l3. On the other ends of the bars 10 are secured bars ll: having axles 15 upon which are 10111?- 11 ed wheels-16. The wheels 13 and 1-3 are of proper gage to travel upon the rails A of a traclrway. The numeral 17 designates a transverse brace which is secured to the the accompanying drawings in of my device,

is a side elevation of a modified lars 10 and 14-; The other ends of the bars 10 are connected. by a transverse bar 18 upon-which secured a depending pivoted catch 1.) which for the purpose to be described.

Disposed below this main frame is the drill frame which consists of longitudinal bars 90 which are connected by open rectangular castings 21 and 22. This drill frame is suspended beneath the main frame by means of hangers 2? and arranged in pair and pivoted to the frame bars 10. The numerals 25 and 26 designate transverse bars which connect the hangers and which are secured to the drill frame. Associated with the bar 26 is a pivoted hanger arm 2? which has its upper end formed angular to define a handle 28 which may be moved to swing the entire drill frame upwardly with the bar 26 engagin the catch 19, as shown in Figure 4-. so that the device will be in non-ohstructing relation to any obstacles which might be found between the rails.

In order to holdthe drill frame in its lowered position when a drilling operation is to be carried out I provide aplurality of arms 29 pivoted at 30, upon the drill frame and having their free ends down-turned, as

' shown at 31, to define hooks engageable over frame is an engine 36 of any ordinary or preferred type though it is possible that instead of an engine an electric motor might be used. The numeral 37 designates the engine shaft which carries a pinion 38 meshing with, a gear 39 on a shaft 40 which is journaled through bearings 41 mounted on the swinging frame. At its end the shaft 40 carries a sprocket 42. Intermediate of its ends the shaft 40 carries a gear 43.

Spaced from the bearing 41 nearest the engine is a bearing 44 and j ournaled through the bearing 44 and adjacent bearing 41 are shafts 45 and 46. Rotatable upon the shaft 46 is a pinion 47 which carries a clutch mernber 48 and splined upon the shaft 46 is a coacting clutch member 49 movable by means of a suitable lever 50 into or out of engagement with the clutch member 48. The shaft 46 carries at one end a gear 51 which meshes with the gear 43.

Secured within the swinging frame is a nut member 52 within which is threaded a feed screw 53 which is provided at one end with a reduced portion 54 extending along the swinging frame and provided at its end portion with a crank handle The other end of the feed screw carries a cup member 56 which receives a projection 57 on a drill spindle 58, balls 59 being interposed between the projection and the cup member whereby the spindle 58may rotate independently of rotary movement of the feed screw. Adjacent its end the spindle 58 has splined there on a sprocket 60 about which is trained a chain 61 which is in turn trained about the' sprocket 42. The extremity of the spindle carries a suitable chuck 62 within which is engaged a drill bit 63. Splined onto the feed screw 53 is a pinion 64 which meshes with an idle gear 65. on the shaft 45, this gear 65 also meshing with the pinion 47.

The operation of the device is as follows: Ordinarily the swinging frame is held in elevated position by means of the catch member 19 and the hook arms 29 are held in elevated position. The device is then free to be moved from place to place upon the rails.

henever it is desired to bore a hole in a rail the catch 19 is swung to release the swinging frame which will descend into the position shown in Figure 3. The operator then moves the handle 33 to engage the hooks 31 of the arms 29 over the rail to be drilled and this will result in holding the swinging frame stationary. The engine 36 being in operation, the shaft 40 will be driven and the drill, spindle will consequently be driven through the chain 61. The lever 50 is moved to bring the clutch 49 into engagement with the clutch member 48 carried by the gear 47 which rotates constantly while the engine is in operation by virtue of the gears 43 and 51. This will result in rotation of the gear 65 and consequently the pinion 64 which, being threaded onto the feed screw will cause the feed. screwto be advanced so as to move the drill spindle toward the rail to feed the drill into the rail.

lVhen the holes have been drilled the clutch lever 50 is shifted to disengage the clutch member 49 from the clutch member 43 whereupon the feed screw will be idle so far as the motor is concerned. The operator then QHSPS the crank handle 55 and rotates the feed screw in the reverse direction to of the engine 36 and this switch 66 is adapt ed to be opened by a projection 67 on the spindle near the handle 55 so that when a hole is finished the power will be automatically cutoff.

In Figures 8 and 9 I have shown another form of the device. In this form the engine shaft 70 carries a pinion. 71 meshing with a gear 72 rotatableon a'counter shaft 73. Formed on the gear 72 is a clutch face 74 engageable by a clutch member 7 5 splined upon the countershaft. Secured on the coun tershaft is a sprocket 76 about which is trained a chain 77 which is trained. about a sprocket 78 having an internally threaded hub 79 through which passes the feed screw 80 carrying a drill socket or chuck 81. Splinedupon the countershaft is a clutch member 82 movable intoengageinent with a clutch element 83 formed on a gear 84 revoluble on the countershaft. Meshing with the gear 84 is an intermediate gear 85 which meshes with a gear 86 splined upon the feed screw.

In the operation of thisform, the clutch members 75 and 74 are engaged and the clutch members 82 and 83 are engaged whereupon the feed screw will be rotated by the gears 84, 65 and 86 and will be advanced forwardly by the rotation of the sprockets.

By disconnecting the clutch members 7 5 and Tel the entire drilling mechanism becomes idle as the gear 72 rotates upon the shaft 7 By leaving the clutch members 75 and 74; engaged and disconnecting clutch members 82 and 83 the feed screw ceases to rotate while the sprockets continue to rotate and this will result in retraction of the drill after a hole has been bored. This construction is more compact than the first described form and has the advantage of eliminating one spindle.

From the foregoing description and a study of the drawings it will be apparent that I have thus provided a highly efficient device for drilling bonding holes in the joints of rails, the device being rapid in operation and consequently being a great time and labor saver.

While I have shown and described the preferred embodiments of my invention, it

is of course to be understood that I reserve the right to make such changes in the form, construction, and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claim. Having thus described my invention, I claim:

A device of the character described comprising an elongated substantially rectangular supporting frame mounted upon wheels adapted to travel upon rail-road tracks, a plurality of depending hangers pivotally connected with the sides of said frame and all of the same length, an auxiliary frame of less dimensions than said main frame pivotally connected. with the lower ends of the hangers and disposed in parallel relation below the main frame when in lowered position, a lever connected with said auxiliary frame whereby the same may be swung upwardly, a depending catch member secured upon the main frame and engageable by the auxiliary frame whereby to hold the latter elevated, a pair of arms pivoted upon the sides of the auxiliary frame and having their free ends formed as books engageable over a rail, a lever pivotally connected with said arms and extendin upwardly in an inclined direction and IOI'IIlQCl with a retaining notch, and a transverse catch carried by the main frame engageable by said notch whereby to hold said arms out of engagement with the rail and a drilling mechanism carried by the auxiliary frame.

In testimony whereof I affix my signature.

PAUL G. BODWELL. 

